Aperture Arrays -Past, Present & Future!
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1 Aperture Arrays -Past, Present & Future! Prof. Michael Garrett ASTRON, the Netherlands Institute for Radio Astronomy Leiden University. Mike Garrett / NAC 1
2 Aperture Array concept 2
3 Aperture Array concept +Δt 2
4 Aperture Array concept -Δt - Unblocked aperture with full view of the whole sky! - Ultimate flexibility with no moving parts! - Beams are formed and controlled electronically at element level 2
5 Aperture Array concept ±Δt - Unblocked aperture with full view of the whole sky! - Ultimate flexibility with no moving parts! - Beams are formed and controlled electronically at element level - Permits concurrent, possibly associated, multi-beam observations - Technology of choice at frequencies < ~1.5 GHz 2
6 Not a new idea... Archimedes (212 BC)
7 Dipole (Aperture) Arrays - Past Jansky 1932 WWII - Radar Hey
8 Aperture Array a lost technology : ?
9 Aperture Arrays - 40 years on - Present - Radio Astronomy Re-invented - Cesarsky et al. LOFAR LWA `LWA PAPER MWA
10 Imaging Non-imaging applications MWA: LOFAR MWA: MWA:
11 Imaging Non-imaging applications MWA: LOFAR MWA: MWA:
12 Imaging Non-imaging applications MWA: LOFAR MWA: MWA:
13 Mid-frequency Aperture Array Developments at ASTRON ( ) Aperture Arrays R&D focused on: - concept demonstration, - integration, - cost reduction. THEA, 2006 EMBRACE, 2012 LOFAR OSMA,1998
14 Mid-frequency Aperture Array Developments at ASTRON ( ) Aperture Arrays R&D focused on: - concept demonstration, - integration, - cost reduction. THEA, 2006 EMBRACE, 2012 LOFAR OSMA,1998
15 Mid-frequency Aperture Array Developments at ASTRON ( ) Aperture Arrays R&D focused on: - concept demonstration, - integration, - cost reduction. THEA, 2006 EMBRACE, 2012 LOFAR OSMA,1998 Ardenne et al. Kant et al. Capellan et al. Faulkner et al. bij de Vaate et al.
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18 Mid-frequency Aperture Arrays - beyond Radio Astronomy - Present...
19 Mid-frequency Aperture Arrays - beyond Radio Astronomy - Present...
20 Mid-frequency Aperture Arrays - beyond Radio Astronomy - Present...
21 Mid-frequency Aperture Arrays - beyond Radio Astronomy - Present...
22 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow.
23 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow. Dense Aperture Arrays (DAA) developments will set the relevant timescales for SKA-2 construction.
24 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow. Dense Aperture Arrays (DAA) developments will set the relevant timescales for SKA-2 construction. Non-imaging applications will become more and more important.
25 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow. Dense Aperture Arrays (DAA) developments will set the relevant timescales for SKA-2 construction. Non-imaging applications will become more and more important. Data size/processing and technical expertise are the major bottleneck!
26 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow. Dense Aperture Arrays (DAA) developments will set the relevant timescales for SKA-2 construction. Non-imaging applications will become more and more important. Data size/processing and technical expertise are the major bottleneck! SKA should amaze generations to come!
27 Mid-Frequency Aperture Arrays - the Future SKA at mid-frequencies: - simply building a VLA on steroids is not good enough! - need to be as innovative as technology will allow. Dense Aperture Arrays (DAA) developments will set the relevant timescales for SKA-2 construction. Non-imaging applications will become more and more important. Data size/processing and technical expertise are the major bottleneck! SKA should amaze generations to come! The development of a scientifically capable 21cm Dense Aperture Array demonstrator is necessary on route to SKA-2.
28 ASTRON - 5 year plan 2012 t/m 2016 Netherlands Institute for Radio Astronomy ASTRON is part of the Netherlands Organisation for Scientific Research (NWO) 14
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